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Brian Fasteners, founded in Houston, USA, is a well-established manufacturer and supplier of top-grade ASTM A193 B8 Class 4 stud bolts. The company has gained a solid reputation after years of experience in the industry for supplying precision-made fasteners that are designed to meet stringent industrial specifications. Their ASTM A193 B8 CL4 stud bolts are made from high-quality materials that make them last long, resistant to corrosion, and function better. Brian Fasteners provides their wide clientele, including petrochemical, construction, and power generation industries, with dependable solutions as well as timely delivery to satisfy the particular requirements of their domestic and overseas customers.
ASTM A193 B8 CL4 stud bolts are made from AISI 304 stain-hardened stainless steel that offers greater strength and durability. The composition consists of chromium (18–20%), nickel (8–12%), and traces of manganese, silicon, and carbon. These bolts display outstanding mechanical properties, such as a minimum tensile strength of 125 ksi and yield strength of 100 ksi. They also have good elongation and reduction in area. Their tough mechanical properties render them suitable for high-temperature and high-pressure service conditions, as well as providing resistance to oxidation and general corrosion in various applications.
| Element | B8 CL3 | B8 CL3 | B8M CL3 |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B8 CL3 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 | |
| B8 CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL3 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 | |
| B8M CL3 Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 – 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 – 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 – 1-1/2 | 90 | 50 | 30 | 45 |
Material | Specification | Standards | Size | Length |
ASTM A193 B8 CL4 Stud Bolt
| IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A193 B8 CL4 stud bolts are extensively utilized in high-temperature and high-pressure applications, including power plant services, chemical plants, and oil and gas systems. They possess excellent mechanical strength and corrosion resistance and are employed in flanged connections, heat exchangers, valves, and pressure vessels. These screws are desirable in conditions where strength and durability are imperative under harsh operating conditions. Moreover, they are also broadly utilized in marine and offshore construction because they can withstand extreme and corrosive conditions, providing long-term reliability and performance in stringent conditions.
At Brian Fasteners, we prioritize the secure packaging of our ASTM A193 B8 CL4 stud bolts to ensure they reach you in optimal condition. Each stud bolt is carefully inspected and packaged using robust, protective materials to prevent damage during transit. Our packaging solutions include detailed labeling for easy identification and handling. Whether you’re ordering small quantities or bulk, we provide customized packaging options to meet your needs, guaranteeing the safe and efficient delivery of your fasteners.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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